In this mode, the user can specify a QGIS expression for the
lower and upper value corresponding to raster bands, using
variables like @band, @band_name and @band_description.
E.g
@band * 100
Can be used when each band represents a 100 m vertical slice
of data.
The expression will be evaluated when required to determine
the actual elevation range corresponding to each band.
This differs from the existing "Fixed Elevation Range Per Band"
mode in that "Fixed Elevation Range Per Band" requires users
to manually enter an elevation for each band separately,
and these values are then treated as constants. That mode works
best for rasters with non-regular steps in the band
elevation values, while this new mode is better for regular
band elevation steps
In this mode, each band in the raster can have a fixed elevation
range associated with it. This is designed for data sources which
expose elevation related data in bands, eg netcdf files, such
as a raster with temperate data at different ocean depths.
This introduces a new option for specifying how raster layers
have associated elevation. It permits a fixed elevation range
to be set for the layer. It can be used when the layer has
a single fixed elevation, or a range (slice) of elevation values.
Users can set the lower and upper elevation range for the layer,
and whether the lower or upper limits are inclusive or
exclusive.
When enabled, the layer will only be visible in elevation
filtered 2d maps when the layer's range is included in the map's
z range.
and auto-set the "represents elevation" flag for these
We do this when:
- the layer contains only one band
- the data type is int or float (not complex, rgb or byte)
- the layer doesn't have an attribute table
- there's something "dem-like" in the layer's name (ie 'elevation',
'dem', 'height', 'srtm')
This should help make the elevation profile tool more user-friendly,
as these layers will be included in the profiles by default
using a fill symbol below the elevation surface
This can be easier to interpret in some cases, and helps match expected
symbology conventions in certain disciplines.
Allows elevation properties to be set for vector layers, including:
- altitude binding
- altitude clamping
- extrusion
- scale
- offset
These properties can be set through the new "Elevation" tab in
the vector layer properties dialog
Allows elevation properties to be set for raster layers, including:
- whether raster values represent heights
- scale
- offset
These properties can be set through the new "Elevation" tab in
the raster layer properties dialog
